Mold Resources The microscopic fungus grows wherever moisture is present – in debris, inside walls, under floors, in attics. If not treated, mold can cause disease, trigger allergic reactions and damage materials long after the storm. Get Rid of Mold (FEMA)  Flood Cleanup (EPA)  Mold After a Disaster (CDC)  Floods (CDC)  A Brief Guide to Mold, Moisture, and Your Home (EPA)